A University of New Mexico School of Medicine administrator says 37 people have come forward to identify themselves as participants in a medical screening test that might have placed them at risk for contracting serious diseases.

The schools associate dean for clinical affairs, Dr. Robert Bailey, says tests conducted so far on 27 patients have come back negative for Hepatitis B, Hepatitis C and HIV. He says that means the possibility for infection is considered minimal.

Concerns arose after a group of students in the physician assistant program failed to properly change needles on devices used for blood glucose testing. Free testing was offered April 24 at the Indian Pueblo Cultural Center in Albuquerque.